| /* SPDX-License-Identifier: MIT */ |
| |
| /* this is a pretty robust parser for EDID, and we're tasked with parsing |
| * an arbitrary panel. We will pass it a raw EDID block and a struct which |
| * it must fill in with values. The set of values we need is pretty limited |
| * at present. |
| */ |
| |
| #include <assert.h> |
| #include <commonlib/helpers.h> |
| #include <console/console.h> |
| #include <ctype.h> |
| #include <stdint.h> |
| #include <string.h> |
| #include <edid.h> |
| #include <vbe.h> |
| |
| struct edid_context { |
| int claims_one_point_oh; |
| int claims_one_point_two; |
| int claims_one_point_three; |
| int claims_one_point_four; |
| int nonconformant_digital_display; |
| int nonconformant_extension; |
| int did_detailed_timing; |
| int has_name_descriptor; |
| int has_range_descriptor; |
| int has_preferred_timing; |
| int has_valid_checksum; |
| int has_valid_cvt; |
| int has_valid_dummy_block; |
| int has_valid_week; |
| int has_valid_year; |
| int has_valid_detailed_blocks; |
| int has_valid_extension_count; |
| int has_valid_descriptor_ordering; |
| int has_valid_descriptor_pad; |
| int has_valid_range_descriptor; |
| int has_valid_max_dotclock; |
| int has_valid_string_termination; |
| int manufacturer_name_well_formed; |
| int seen_non_detailed_descriptor; |
| int warning_excessive_dotclock_correction; |
| int warning_zero_preferred_refresh; |
| enum edid_status conformant; |
| }; |
| |
| /* Stuff that isn't used anywhere but is nice to pretty-print while |
| we're decoding everything else. */ |
| static struct { |
| unsigned int model; |
| unsigned int serial; |
| unsigned int year; |
| unsigned int week; |
| unsigned int version[2]; |
| unsigned int nonconformant; |
| unsigned int type; |
| |
| unsigned int x_mm; |
| unsigned int y_mm; |
| |
| unsigned int voltage; |
| unsigned int sync; |
| |
| const char *syncmethod; |
| const char *range_class; |
| const char *stereo; |
| } extra_info; |
| |
| static struct edid tmp_edid; |
| |
| static int manufacturer_name(unsigned char *x, char *output) |
| { |
| output[0] = ((x[0] & 0x7C) >> 2) + '@'; |
| output[1] = ((x[0] & 0x03) << 3) + ((x[1] & 0xE0) >> 5) + '@'; |
| output[2] = (x[1] & 0x1F) + '@'; |
| output[3] = 0; |
| |
| if (isupper(output[0]) && |
| isupper(output[1]) && |
| isupper(output[2])) |
| return 1; |
| |
| memset(output, 0, 4); |
| return 0; |
| } |
| |
| static int |
| detailed_cvt_descriptor(unsigned char *x, int first) |
| { |
| const unsigned char empty[3] = { 0, 0, 0 }; |
| static const char *names[] = { "50", "60", "75", "85" }; |
| int width = 0, height = 0; |
| int valid = 1; |
| int fifty = 0, sixty = 0, seventyfive = 0, eightyfive = 0, reduced = 0; |
| |
| if (!first && !memcmp(x, empty, 3)) |
| return valid; |
| |
| height = x[0]; |
| height |= (x[1] & 0xf0) << 4; |
| height++; |
| height *= 2; |
| |
| switch (x[1] & 0x0c) { |
| case 0x00: |
| width = (height * 4) / 3; break; |
| case 0x04: |
| width = (height * 16) / 9; break; |
| case 0x08: |
| width = (height * 16) / 10; break; |
| case 0x0c: |
| width = (height * 15) / 9; break; |
| } |
| |
| if (x[1] & 0x03) |
| valid = 0; |
| if (x[2] & 0x80) |
| valid = 0; |
| if (!(x[2] & 0x1f)) |
| valid = 0; |
| |
| fifty = (x[2] & 0x10); |
| sixty = (x[2] & 0x08); |
| seventyfive = (x[2] & 0x04); |
| eightyfive = (x[2] & 0x02); |
| reduced = (x[2] & 0x01); |
| |
| if (!valid) { |
| printk(BIOS_SPEW, " (broken)\n"); |
| } else { |
| printk(BIOS_SPEW, |
| " %dx%d @ (%s%s%s%s%s) Hz (%s%s preferred)\n", |
| width, height, |
| fifty ? "50 " : "", |
| sixty ? "60 " : "", |
| seventyfive ? "75 " : "", |
| eightyfive ? "85 " : "", |
| reduced ? "60RB " : "", |
| names[(x[2] & 0x60) >> 5], |
| (((x[2] & 0x60) == 0x20) && reduced) ? "RB" : ""); |
| } |
| |
| return valid; |
| } |
| |
| /* extract a CP437 string from a detailed subblock, checking for termination (if |
| * less than len of bytes) with LF and padded with SP. |
| */ |
| static char * |
| extract_string(unsigned char *x, int *valid_termination, int len) |
| { |
| static char ret[EDID_ASCII_STRING_LENGTH + 1]; |
| int i, seen_newline = 0; |
| |
| memset(ret, 0, sizeof(ret)); |
| |
| for (i = 0; i < MIN(len, EDID_ASCII_STRING_LENGTH); i++) { |
| if (seen_newline) { |
| if (x[i] != 0x20) { |
| *valid_termination = 0; |
| return ret; |
| } |
| } else if (x[i] == 0x0a) { |
| seen_newline = 1; |
| } else { |
| /* normal characters */ |
| ret[i] = x[i]; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /* 1 means valid data */ |
| static int |
| detailed_block(struct edid *result_edid, unsigned char *x, int in_extension, |
| struct edid_context *c) |
| { |
| struct edid *out = &tmp_edid; |
| int i; |
| |
| if (console_log_level(BIOS_SPEW)) { |
| printk(BIOS_SPEW, "Hex of detail: "); |
| for (i = 0; i < 18; i++) |
| printk(BIOS_SPEW, "%02x", x[i]); |
| printk(BIOS_SPEW, "\n"); |
| } |
| |
| /* Result might already have some valid fields like mode_is_supported */ |
| *out = *result_edid; |
| |
| if (x[0] == 0 && x[1] == 0) { |
| /* Monitor descriptor block, not detailed timing descriptor. */ |
| if (x[2] != 0) { |
| /* 1.3, 3.10.3 */ |
| printk(BIOS_SPEW, |
| "Monitor descriptor block has byte 2 nonzero (0x%02x)\n", |
| x[2]); |
| c->has_valid_descriptor_pad = 0; |
| } |
| if (x[3] != 0xfd && x[4] != 0x00) { |
| /* 1.3, 3.10.3 */ |
| printk(BIOS_SPEW, |
| "Monitor descriptor block has byte 4 nonzero (0x%02x)\n", |
| x[4]); |
| c->has_valid_descriptor_pad = 0; |
| } |
| |
| c->seen_non_detailed_descriptor = 1; |
| if (x[3] <= 0xF) { |
| /* |
| * in principle we can decode these, if we know what |
| * they are. |
| * 0x0f seems to be common in laptop panels. |
| * 0x0e is used by EPI: http://www.epi-standard.org/ |
| */ |
| printk(BIOS_SPEW, |
| "Manufacturer-specified data, tag %d\n", x[3]); |
| return 1; |
| } |
| switch (x[3]) { |
| case 0x10: |
| printk(BIOS_SPEW, "Dummy block\n"); |
| for (i = 5; i < 18; i++) |
| if (x[i] != 0x00) |
| c->has_valid_dummy_block = 0; |
| return 1; |
| case 0xF7: |
| /* TODO */ |
| printk(BIOS_SPEW, "Established timings III\n"); |
| return 1; |
| case 0xF8: |
| { |
| int valid_cvt = 1; /* just this block */ |
| printk(BIOS_SPEW, "CVT 3-byte code descriptor:\n"); |
| if (x[5] != 0x01) { |
| c->has_valid_cvt = 0; |
| return 0; |
| } |
| for (i = 0; i < 4; i++) |
| valid_cvt &= detailed_cvt_descriptor(x + 6 |
| + (i * 3), (i == 0)); |
| c->has_valid_cvt &= valid_cvt; |
| return 1; |
| } |
| case 0xF9: |
| /* TODO */ |
| printk(BIOS_SPEW, "Color management data\n"); |
| return 1; |
| case 0xFA: |
| /* TODO */ |
| printk(BIOS_SPEW, "More standard timings\n"); |
| return 1; |
| case 0xFB: |
| /* TODO */ |
| printk(BIOS_SPEW, "Color point\n"); |
| return 1; |
| case 0xFC: |
| printk(BIOS_SPEW, "Monitor name: %s\n", |
| extract_string(x + 5, |
| &c->has_valid_string_termination, |
| EDID_ASCII_STRING_LENGTH)); |
| c->has_name_descriptor = 1; |
| return 1; |
| case 0xFD: |
| { |
| int h_max_offset = 0, h_min_offset = 0; |
| int v_max_offset = 0, v_min_offset = 0; |
| int is_cvt = 0; |
| c->has_range_descriptor = 1; |
| extra_info.range_class = ""; |
| /* |
| * XXX todo: implement feature flags, vtd blocks |
| * XXX check: ranges are well-formed; block termination |
| * if no vtd |
| */ |
| if (c->claims_one_point_four) { |
| if (x[4] & 0x02) { |
| v_max_offset = 255; |
| if (x[4] & 0x01) |
| v_min_offset = 255; |
| } |
| if (x[4] & 0x04) { |
| h_max_offset = 255; |
| if (x[4] & 0x03) |
| h_min_offset = 255; |
| } |
| } else if (x[4]) { |
| c->has_valid_range_descriptor = 0; |
| } |
| |
| /* |
| * despite the values, this is not a bitfield. |
| */ |
| switch (x[10]) { |
| case 0x00: /* default gtf */ |
| extra_info.range_class = "GTF"; |
| break; |
| case 0x01: /* range limits only */ |
| extra_info.range_class = "bare limits"; |
| if (!c->claims_one_point_four) |
| c->has_valid_range_descriptor = 0; |
| break; |
| case 0x02: /* secondary gtf curve */ |
| extra_info.range_class = "GTF with icing"; |
| break; |
| case 0x04: /* cvt */ |
| extra_info.range_class = "CVT"; |
| is_cvt = 1; |
| if (!c->claims_one_point_four) |
| c->has_valid_range_descriptor = 0; |
| break; |
| default: /* invalid */ |
| c->has_valid_range_descriptor = 0; |
| extra_info.range_class = "invalid"; |
| break; |
| } |
| |
| if (x[5] + v_min_offset > x[6] + v_max_offset) |
| c->has_valid_range_descriptor = 0; |
| if (x[7] + h_min_offset > x[8] + h_max_offset) |
| c->has_valid_range_descriptor = 0; |
| printk(BIOS_SPEW, |
| "Monitor ranges (%s): %d-%dHz V, %d-%dkHz H", |
| extra_info.range_class, |
| x[5] + v_min_offset, x[6] + v_max_offset, |
| x[7] + h_min_offset, x[8] + h_max_offset); |
| if (x[9]) |
| printk(BIOS_SPEW, |
| ", max dotclock %dMHz\n", x[9] * 10); |
| else { |
| if (c->claims_one_point_four) |
| c->has_valid_max_dotclock = 0; |
| printk(BIOS_SPEW, "\n"); |
| } |
| |
| if (is_cvt) { |
| int max_h_pixels = 0; |
| |
| printk(BIOS_SPEW, "CVT version %d.%d\n", |
| x[11] & 0xf0 >> 4, x[11] & 0x0f); |
| |
| if (x[12] & 0xfc) { |
| int raw_offset = (x[12] & 0xfc) >> 2; |
| printk(BIOS_SPEW, |
| "Real max dotclock: %dKHz\n", |
| (x[9] * 10000) |
| - (raw_offset * 250)); |
| if (raw_offset >= 40) |
| c->warning_excessive_dotclock_correction = 1; |
| } |
| |
| max_h_pixels = x[12] & 0x03; |
| max_h_pixels <<= 8; |
| max_h_pixels |= x[13]; |
| max_h_pixels *= 8; |
| if (max_h_pixels) |
| printk(BIOS_SPEW, |
| "Max active pixels per line: %d\n", |
| max_h_pixels); |
| |
| printk(BIOS_SPEW, |
| "Supported aspect ratios: %s %s %s %s %s\n", |
| x[14] & 0x80 ? "4:3" : "", |
| x[14] & 0x40 ? "16:9" : "", |
| x[14] & 0x20 ? "16:10" : "", |
| x[14] & 0x10 ? "5:4" : "", |
| x[14] & 0x08 ? "15:9" : ""); |
| if (x[14] & 0x07) |
| c->has_valid_range_descriptor = 0; |
| |
| printk(BIOS_SPEW, "Preferred aspect ratio: "); |
| switch ((x[15] & 0xe0) >> 5) { |
| case 0x00: |
| printk(BIOS_SPEW, "4:3"); |
| break; |
| case 0x01: |
| printk(BIOS_SPEW, "16:9"); |
| break; |
| case 0x02: |
| printk(BIOS_SPEW, "16:10"); |
| break; |
| case 0x03: |
| printk(BIOS_SPEW, "5:4"); |
| break; |
| case 0x04: |
| printk(BIOS_SPEW, "15:9"); |
| break; |
| default: |
| printk(BIOS_SPEW, "(broken)"); |
| break; |
| } |
| printk(BIOS_SPEW, "\n"); |
| |
| if (x[15] & 0x04) |
| printk(BIOS_SPEW, |
| "Supports CVT standard blanking\n"); |
| if (x[15] & 0x10) |
| printk(BIOS_SPEW, |
| "Supports CVT reduced blanking\n"); |
| |
| if (x[15] & 0x07) |
| c->has_valid_range_descriptor = 0; |
| |
| if (x[16] & 0xf0) { |
| printk(BIOS_SPEW, |
| "Supported display scaling:\n"); |
| if (x[16] & 0x80) |
| printk(BIOS_SPEW, |
| " Horizontal shrink\n"); |
| if (x[16] & 0x40) |
| printk(BIOS_SPEW, |
| " Horizontal stretch\n"); |
| if (x[16] & 0x20) |
| printk(BIOS_SPEW, |
| " Vertical shrink\n"); |
| if (x[16] & 0x10) |
| printk(BIOS_SPEW, |
| " Vertical stretch\n"); |
| } |
| |
| if (x[16] & 0x0f) |
| c->has_valid_range_descriptor = 0; |
| |
| if (x[17]) |
| printk(BIOS_SPEW, |
| "Preferred vertical refresh: %d Hz\n", |
| x[17]); |
| else |
| c->warning_zero_preferred_refresh = 1; |
| } |
| |
| /* |
| * Slightly weird to return a global, but I've never |
| * seen any EDID block with two range descriptors, so |
| * it's harmless. |
| */ |
| return 1; |
| } |
| case 0xFE: |
| /* |
| * TODO: Two of these in a row, in the third and fourth |
| * slots, seems to be specified by SPWG: |
| * http://www.spwg.org/ |
| */ |
| strcpy(result_edid->ascii_string, extract_string(x + 5, |
| &c->has_valid_string_termination, |
| EDID_ASCII_STRING_LENGTH)); |
| printk(BIOS_SPEW, "ASCII string: %s\n", |
| result_edid->ascii_string); |
| return 1; |
| case 0xFF: |
| printk(BIOS_SPEW, "Serial number: %s\n", |
| extract_string(x + 5, |
| &c->has_valid_string_termination, |
| EDID_ASCII_STRING_LENGTH)); |
| return 1; |
| default: |
| printk(BIOS_SPEW, |
| "Unknown monitor description type %d\n", |
| x[3]); |
| return 0; |
| } |
| } |
| |
| if (c->seen_non_detailed_descriptor && !in_extension) |
| c->has_valid_descriptor_ordering = 0; |
| |
| /* Edid contains pixel clock in terms of 10KHz */ |
| out->mode.pixel_clock = (x[0] + (x[1] << 8)) * 10; |
| /* |
| LVDS supports following pixel clocks |
| 25000...112000 kHz: single channel |
| 80000...224000 kHz: dual channel |
| There is some overlap in theoretically supported |
| pixel clock between single-channel and dual-channel. |
| In practice with current panels all panels |
| <= 75200 kHz: single channel |
| >= 97750 kHz: dual channel |
| We have no samples between those values, so put a |
| threshold at 95000 kHz. If we get anything over |
| 95000 kHz with single channel, we can make this |
| more sophisticated but it's currently not needed. |
| */ |
| out->mode.lvds_dual_channel = (out->mode.pixel_clock >= 95000); |
| extra_info.x_mm = (x[12] + ((x[14] & 0xF0) << 4)); |
| extra_info.y_mm = (x[13] + ((x[14] & 0x0F) << 8)); |
| out->mode.ha = (x[2] + ((x[4] & 0xF0) << 4)); |
| out->mode.hbl = (x[3] + ((x[4] & 0x0F) << 8)); |
| out->mode.hso = (x[8] + ((x[11] & 0xC0) << 2)); |
| out->mode.hspw = (x[9] + ((x[11] & 0x30) << 4)); |
| out->mode.hborder = x[15]; |
| out->mode.va = (x[5] + ((x[7] & 0xF0) << 4)); |
| out->mode.vbl = (x[6] + ((x[7] & 0x0F) << 8)); |
| out->mode.vso = ((x[10] >> 4) + ((x[11] & 0x0C) << 2)); |
| out->mode.vspw = ((x[10] & 0x0F) + ((x[11] & 0x03) << 4)); |
| out->mode.vborder = x[16]; |
| |
| /* We assume rgb888 (32 bits per pixel) framebuffers by default. |
| * Chipsets that want something else will need to override this with |
| * another call to edid_set_framebuffer_bits_per_pixel(). As a cheap |
| * heuristic, assume that X86 systems require a 64-byte row alignment |
| * (since that seems to be true for most Intel chipsets). */ |
| if (ENV_X86) |
| edid_set_framebuffer_bits_per_pixel(out, 32, 64); |
| else |
| edid_set_framebuffer_bits_per_pixel(out, 32, 0); |
| |
| switch ((x[17] & 0x18) >> 3) { |
| case 0x00: |
| extra_info.syncmethod = " analog composite"; |
| break; |
| case 0x01: |
| extra_info.syncmethod = " bipolar analog composite"; |
| break; |
| case 0x02: |
| extra_info.syncmethod = " digital composite"; |
| break; |
| case 0x03: |
| extra_info.syncmethod = ""; |
| break; |
| } |
| out->mode.pvsync = (x[17] & (1 << 2)) ? '+' : '-'; |
| out->mode.phsync = (x[17] & (1 << 1)) ? '+' : '-'; |
| switch (x[17] & 0x61) { |
| case 0x20: |
| extra_info.stereo = "field sequential L/R"; |
| break; |
| case 0x40: |
| extra_info.stereo = "field sequential R/L"; |
| break; |
| case 0x21: |
| extra_info.stereo = "interleaved right even"; |
| break; |
| case 0x41: |
| extra_info.stereo = "interleaved left even"; |
| break; |
| case 0x60: |
| extra_info.stereo = "four way interleaved"; |
| break; |
| case 0x61: |
| extra_info.stereo = "side by side interleaved"; |
| break; |
| default: |
| extra_info.stereo = ""; |
| break; |
| } |
| |
| printk(BIOS_SPEW, |
| "Detailed mode (IN HEX): Clock %d KHz, %x mm x %x mm\n" |
| " %04x %04x %04x %04x hborder %x\n" |
| " %04x %04x %04x %04x vborder %x\n" |
| " %chsync %cvsync%s%s%s\n", |
| out->mode.pixel_clock, |
| extra_info.x_mm, |
| extra_info.y_mm, |
| out->mode.ha, out->mode.ha + out->mode.hso, |
| out->mode.ha + out->mode.hso + out->mode.hspw, |
| out->mode.ha + out->mode.hbl, out->mode.hborder, |
| out->mode.va, out->mode.va + out->mode.vso, |
| out->mode.va + out->mode.vso + out->mode.vspw, |
| out->mode.va + out->mode.vbl, out->mode.vborder, |
| out->mode.phsync, out->mode.pvsync, |
| extra_info.syncmethod, x[17] & 0x80 ? " interlaced" : "", |
| extra_info.stereo); |
| |
| if (!c->did_detailed_timing) { |
| printk(BIOS_SPEW, "Did detailed timing\n"); |
| c->did_detailed_timing = 1; |
| *result_edid = *out; |
| } |
| |
| return 1; |
| } |
| |
| static int |
| do_checksum(unsigned char *x) |
| { |
| int valid = 0; |
| printk(BIOS_SPEW, "Checksum: 0x%hhx", x[0x7f]); |
| { |
| unsigned char sum = 0; |
| int i; |
| for (i = 0; i < 128; i++) |
| sum += x[i]; |
| if (sum) { |
| printk(BIOS_SPEW, " (should be 0x%hhx)", |
| (unsigned char)(x[0x7f] - sum)); |
| } else { |
| valid = 1; |
| printk(BIOS_SPEW, " (valid)"); |
| } |
| } |
| printk(BIOS_SPEW, "\n"); |
| return valid; |
| } |
| |
| /* CEA extension */ |
| |
| static const char * |
| audio_format(unsigned char x) |
| { |
| switch (x) { |
| case 0: return "RESERVED"; |
| case 1: return "Linear PCM"; |
| case 2: return "AC-3"; |
| case 3: return "MPEG 1 (Layers 1 & 2)"; |
| case 4: return "MPEG 1 Layer 3 (MP3)"; |
| case 5: return "MPEG2 (multichannel)"; |
| case 6: return "AAC"; |
| case 7: return "DTS"; |
| case 8: return "ATRAC"; |
| case 9: return "One Bit Audio"; |
| case 10: return "Dolby Digital+"; |
| case 11: return "DTS-HD"; |
| case 12: return "MAT (MLP)"; |
| case 13: return "DST"; |
| case 14: return "WMA Pro"; |
| case 15: return "RESERVED"; |
| } |
| return "BROKEN"; /* can't happen */ |
| } |
| |
| static void |
| cea_audio_block(unsigned char *x) |
| { |
| int i, format; |
| int length = x[0] & 0x1f; |
| |
| if (length % 3) { |
| printk(BIOS_SPEW, "Broken CEA audio block length %d\n", length); |
| /* XXX non-conformant */ |
| return; |
| } |
| |
| for (i = 1; i < length; i += 3) { |
| format = (x[i] & 0x78) >> 3; |
| printk(BIOS_SPEW, " %s, max channels %d\n", |
| audio_format(format), x[i] & 0x07); |
| printk(BIOS_SPEW, |
| " Supported sample rates (kHz):%s%s%s%s%s%s%s\n", |
| (x[i+1] & 0x40) ? " 192" : "", |
| (x[i+1] & 0x20) ? " 176.4" : "", |
| (x[i+1] & 0x10) ? " 96" : "", |
| (x[i+1] & 0x08) ? " 88.2" : "", |
| (x[i+1] & 0x04) ? " 48" : "", |
| (x[i+1] & 0x02) ? " 44.1" : "", |
| (x[i+1] & 0x01) ? " 32" : ""); |
| if (format == 1) { |
| printk(BIOS_SPEW, |
| " Supported sample sizes (bits):%s%s%s\n", |
| (x[2] & 0x04) ? " 24" : "", |
| (x[2] & 0x02) ? " 20" : "", |
| (x[2] & 0x01) ? " 16" : ""); |
| } else if (format <= 8) { |
| printk(BIOS_SPEW, |
| " Maximum bit rate: %d kHz\n", x[2] * 8); |
| } |
| } |
| } |
| |
| static void |
| cea_video_block(unsigned char *x) |
| { |
| int i; |
| int length = x[0] & 0x1f; |
| |
| for (i = 1; i < length; i++) |
| printk(BIOS_SPEW, " VIC %02d %s\n", x[i] & 0x7f, |
| x[i] & 0x80 ? "(native)" : ""); |
| } |
| |
| static void |
| cea_hdmi_block(struct edid *out, unsigned char *x) |
| { |
| int length = x[0] & 0x1f; |
| |
| out->hdmi_monitor_detected = 1; |
| |
| printk(BIOS_SPEW, " (HDMI)\n"); |
| printk(BIOS_SPEW, |
| " Source physical address %d.%d.%d.%d\n", |
| x[4] >> 4, x[4] & 0x0f, x[5] >> 4, x[5] & 0x0f); |
| |
| if (length > 5) { |
| if (x[6] & 0x80) |
| printk(BIOS_SPEW, " Supports_AI\n"); |
| if (x[6] & 0x40) |
| printk(BIOS_SPEW, " DC_48bit\n"); |
| if (x[6] & 0x20) |
| printk(BIOS_SPEW, " DC_36bit\n"); |
| if (x[6] & 0x10) |
| printk(BIOS_SPEW, " DC_30bit\n"); |
| if (x[6] & 0x08) |
| printk(BIOS_SPEW, " DC_Y444\n"); |
| /* two reserved */ |
| if (x[6] & 0x01) |
| printk(BIOS_SPEW, " DVI_Dual\n"); |
| } |
| |
| if (length > 6) |
| printk(BIOS_SPEW, " Maximum TMDS clock: %dMHz\n", x[7] * 5); |
| |
| /* XXX the walk here is really ugly, and needs to be length-checked */ |
| if (length > 7) { |
| int b = 0; |
| |
| if (x[8] & 0x80) { |
| printk(BIOS_SPEW, " Video latency: %d\n", x[9 + b]); |
| printk(BIOS_SPEW, " Audio latency: %d\n", x[10 + b]); |
| b += 2; |
| } |
| |
| if (x[8] & 0x40) { |
| printk(BIOS_SPEW, |
| " Interlaced video latency: %d\n", x[9 + b]); |
| printk(BIOS_SPEW, |
| " Interlaced audio latency: %d\n", |
| x[10 + b]); |
| b += 2; |
| } |
| |
| if (x[8] & 0x20) { |
| int mask = 0, formats = 0; |
| int len_xx, len_3d; |
| printk(BIOS_SPEW, " Extended HDMI video details:\n"); |
| if (x[9 + b] & 0x80) |
| printk(BIOS_SPEW, " 3D present\n"); |
| if ((x[9 + b] & 0x60) == 0x20) { |
| printk(BIOS_SPEW, |
| " All advertised VICs are 3D-capable\n"); |
| formats = 1; |
| } |
| if ((x[9 + b] & 0x60) == 0x40) { |
| printk(BIOS_SPEW, |
| " 3D-capable-VIC mask present\n"); |
| formats = 1; |
| mask = 1; |
| } |
| switch (x[9 + b] & 0x18) { |
| case 0x00: |
| break; |
| case 0x08: |
| printk(BIOS_SPEW, " Base EDID image size is aspect ratio\n"); |
| break; |
| case 0x10: |
| printk(BIOS_SPEW, " Base EDID image size is in units of 1cm\n"); |
| break; |
| case 0x18: |
| printk(BIOS_SPEW, " Base EDID image size is in units of 5cm\n"); |
| break; |
| } |
| len_xx = (x[10 + b] & 0xe0) >> 5; |
| len_3d = (x[10 + b] & 0x1f) >> 0; |
| b += 2; |
| |
| if (len_xx) { |
| printk(BIOS_SPEW, " Skipping %d bytes that HDMI refuses to publicly" |
| " document\n", len_xx); |
| b += len_xx; |
| } |
| |
| if (len_3d) { |
| if (formats) { |
| if (x[9 + b] & 0x01) |
| printk(BIOS_SPEW, " Side-by-side 3D supported\n"); |
| if (x[10 + b] & 0x40) |
| printk(BIOS_SPEW, " Top-and-bottom 3D supported\n"); |
| if (x[10 + b] & 0x01) |
| printk(BIOS_SPEW, " Frame-packing 3D supported\n"); |
| b += 2; |
| } |
| if (mask) { |
| int i; |
| printk(BIOS_SPEW, |
| " 3D VIC indices:"); |
| /* worst bit ordering ever */ |
| for (i = 0; i < 8; i++) |
| if (x[10 + b] & (1 << i)) |
| printk(BIOS_SPEW, |
| " %d", i); |
| for (i = 0; i < 8; i++) |
| if (x[9 + b] & (1 << i)) |
| printk(BIOS_SPEW, |
| " %d", i + 8); |
| printk(BIOS_SPEW, "\n"); |
| b += 2; |
| } |
| |
| /* |
| * XXX list of nibbles: |
| * 2D_VIC_Order_X |
| * 3D_Structure_X |
| * (optionally: 3D_Detail_X and reserved) |
| */ |
| } |
| } |
| /* Tell static analysis we know index b is left unused. */ |
| (void)b; |
| } |
| } |
| |
| static void |
| cea_block(struct edid *out, unsigned char *x) |
| { |
| unsigned int oui; |
| |
| switch ((x[0] & 0xe0) >> 5) { |
| case 0x01: |
| printk(BIOS_SPEW, " Audio data block\n"); |
| cea_audio_block(x); |
| break; |
| case 0x02: |
| printk(BIOS_SPEW, " Video data block\n"); |
| cea_video_block(x); |
| break; |
| case 0x03: |
| /* yes really, endianness lols */ |
| oui = (x[3] << 16) + (x[2] << 8) + x[1]; |
| printk(BIOS_SPEW, " Vendor-specific data block, OUI %06x", |
| oui); |
| if (oui == 0x000c03) |
| cea_hdmi_block(out, x); |
| else |
| printk(BIOS_SPEW, "\n"); |
| break; |
| case 0x04: |
| printk(BIOS_SPEW, " Speaker allocation data block\n"); |
| break; |
| case 0x05: |
| printk(BIOS_SPEW, " VESA DTC data block\n"); |
| break; |
| case 0x07: |
| printk(BIOS_SPEW, " Extended tag: "); |
| switch (x[1]) { |
| case 0x00: |
| printk(BIOS_SPEW, "video capability data block\n"); |
| break; |
| case 0x01: |
| printk(BIOS_SPEW, "vendor-specific video data block\n"); |
| break; |
| case 0x02: |
| printk(BIOS_SPEW, |
| "VESA video display device information data block\n"); |
| break; |
| case 0x03: |
| printk(BIOS_SPEW, "VESA video data block\n"); |
| break; |
| case 0x04: |
| printk(BIOS_SPEW, "HDMI video data block\n"); |
| break; |
| case 0x05: |
| printk(BIOS_SPEW, "Colorimetry data block\n"); |
| break; |
| case 0x10: |
| printk(BIOS_SPEW, "CEA miscellaneous audio fields\n"); |
| break; |
| case 0x11: |
| printk(BIOS_SPEW, "Vendor-specific audio data block\n"); |
| break; |
| case 0x12: |
| printk(BIOS_SPEW, "HDMI audio data block\n"); |
| break; |
| default: |
| if (x[1] >= 6 && x[1] <= 15) |
| printk(BIOS_SPEW, |
| "Reserved video block (%02x)\n", x[1]); |
| else if (x[1] >= 19 && x[1] <= 31) |
| printk(BIOS_SPEW, |
| "Reserved audio block (%02x)\n", x[1]); |
| else |
| printk(BIOS_SPEW, "Unknown (%02x)\n", x[1]); |
| break; |
| } |
| break; |
| default: |
| { |
| int tag = (*x & 0xe0) >> 5; |
| int length = *x & 0x1f; |
| printk(BIOS_SPEW, |
| " Unknown tag %d, length %d (raw %02x)\n", |
| tag, length, *x); |
| break; |
| } |
| } |
| } |
| |
| static int |
| parse_cea(struct edid *out, unsigned char *x, struct edid_context *c) |
| { |
| int ret = 0; |
| int version = x[1]; |
| int offset = x[2]; |
| unsigned char *detailed; |
| |
| if (version >= 1) |
| do { |
| if (version == 1 && x[3] != 0) |
| ret = 1; |
| |
| if (offset < 4) |
| break; |
| |
| if (version < 3) |
| printk(BIOS_SPEW, |
| "%d 8-byte timing descriptors\n", |
| (offset - 4) / 8); |
| else if (version == 3) { |
| int i; |
| printk(BIOS_SPEW, |
| "%d bytes of CEA data\n", offset - 4); |
| for (i = 4; i < offset; i += (x[i] & 0x1f) + 1) |
| cea_block(out, x + i); |
| } |
| |
| if (version >= 2) { |
| if (x[3] & 0x80) |
| printk(BIOS_SPEW, |
| "Underscans PC formats by default\n"); |
| if (x[3] & 0x40) |
| printk(BIOS_SPEW, |
| "Basic audio support\n"); |
| if (x[3] & 0x20) |
| printk(BIOS_SPEW, |
| "Supports YCbCr 4:4:4\n"); |
| if (x[3] & 0x10) |
| printk(BIOS_SPEW, |
| "Supports YCbCr 4:2:2\n"); |
| printk(BIOS_SPEW, |
| "%d native detailed modes\n", |
| x[3] & 0x0f); |
| } |
| |
| for (detailed = x + offset; detailed + 18 < x + 127; |
| detailed += 18) |
| if (detailed[0]) |
| detailed_block(out, detailed, 1, c); |
| } while (0); |
| |
| c->has_valid_checksum &= do_checksum(x); |
| return ret; |
| } |
| |
| /* generic extension code */ |
| |
| static void |
| extension_version(struct edid *out, unsigned char *x) |
| { |
| printk(BIOS_SPEW, "Extension version: %d\n", x[1]); |
| } |
| |
| static int |
| parse_extension(struct edid *out, unsigned char *x, struct edid_context *c) |
| { |
| int conformant_extension = 0; |
| printk(BIOS_SPEW, "\n"); |
| |
| switch (x[0]) { |
| case 0x02: |
| printk(BIOS_SPEW, "CEA extension block\n"); |
| extension_version(out, x); |
| conformant_extension = parse_cea(out, x, c); |
| break; |
| case 0x10: |
| printk(BIOS_SPEW, "VTB extension block\n"); |
| break; |
| case 0x40: |
| printk(BIOS_SPEW, "DI extension block\n"); |
| break; |
| case 0x50: |
| printk(BIOS_SPEW, "LS extension block\n"); |
| break; |
| case 0x60: |
| printk(BIOS_SPEW, "DPVL extension block\n"); |
| break; |
| case 0xF0: |
| printk(BIOS_SPEW, "Block map\n"); |
| break; |
| case 0xFF: |
| printk(BIOS_SPEW, "Manufacturer-specific extension block\n"); |
| break; |
| default: |
| printk(BIOS_SPEW, "Unknown extension block\n"); |
| break; |
| } |
| |
| printk(BIOS_SPEW, "\n"); |
| |
| return conformant_extension; |
| } |
| |
| static const struct { |
| int x, y, refresh; |
| } established_timings[] = { |
| /* 0x23 bit 7 - 0 */ |
| {720, 400, 70}, |
| {720, 400, 88}, |
| {640, 480, 60}, |
| {640, 480, 67}, |
| {640, 480, 72}, |
| {640, 480, 75}, |
| {800, 600, 56}, |
| {800, 600, 60}, |
| /* 0x24 bit 7 - 0 */ |
| {800, 600, 72}, |
| {800, 600, 75}, |
| {832, 624, 75}, |
| {1280, 768, 87}, |
| {1024, 768, 60}, |
| {1024, 768, 70}, |
| {1024, 768, 75}, |
| {1280, 1024, 75}, |
| /* 0x25 bit 7*/ |
| {1152, 870, 75}, |
| }; |
| |
| static void print_subsection(const char *name, unsigned char *edid, int start, |
| int end) |
| { |
| int i; |
| |
| printk(BIOS_SPEW, "%s:", name); |
| for (i = strlen(name); i < 15; i++) |
| printk(BIOS_SPEW, " "); |
| for (i = start; i <= end; i++) |
| printk(BIOS_SPEW, " %02x", edid[i]); |
| printk(BIOS_SPEW, "\n"); |
| } |
| |
| static void dump_breakdown(unsigned char *edid) |
| { |
| printk(BIOS_SPEW, "Extracted contents:\n"); |
| print_subsection("header", edid, 0, 7); |
| print_subsection("serial number", edid, 8, 17); |
| print_subsection("version", edid, 18, 19); |
| print_subsection("basic params", edid, 20, 24); |
| print_subsection("chroma info", edid, 25, 34); |
| print_subsection("established", edid, 35, 37); |
| print_subsection("standard", edid, 38, 53); |
| print_subsection("descriptor 1", edid, 54, 71); |
| print_subsection("descriptor 2", edid, 72, 89); |
| print_subsection("descriptor 3", edid, 90, 107); |
| print_subsection("descriptor 4", edid, 108, 125); |
| print_subsection("extensions", edid, 126, 126); |
| print_subsection("checksum", edid, 127, 127); |
| printk(BIOS_SPEW, "\n"); |
| } |
| |
| /* |
| * Lookup table of some well-known modes that can be useful in case the |
| * auto-detected mode is unsuitable. |
| * ha = hdisplay; va = vdisplay; |
| * hbl = htotal - hdisplay; vbl = vtotal - vdisplay; |
| * hso = hsync_start - hdsiplay; vso = vsync_start - vdisplay; |
| * hspw = hsync_end - hsync_start; vspw = vsync_end - vsync_start; |
| */ |
| static struct edid_mode known_modes[NUM_KNOWN_MODES] = { |
| [EDID_MODE_640x480_60Hz] = { |
| .name = "640x480@60Hz", .pixel_clock = 25200, .refresh = 60, |
| .ha = 640, .hbl = 160, .hso = 16, .hspw = 96, |
| .va = 480, .vbl = 45, .vso = 10, .vspw = 2, |
| .phsync = '-', .pvsync = '-' }, |
| [EDID_MODE_720x480_60Hz] = { |
| .name = "720x480@60Hz", .pixel_clock = 27000, .refresh = 60, |
| .ha = 720, .hbl = 138, .hso = 16, .hspw = 62, |
| .va = 480, .vbl = 45, .vso = 9, .vspw = 6, |
| .phsync = '-', .pvsync = '-' }, |
| [EDID_MODE_1280x720_60Hz] = { |
| .name = "1280x720@60Hz", .pixel_clock = 74250, .refresh = 60, |
| .ha = 1280, .hbl = 370, .hso = 110, .hspw = 40, |
| .va = 720, .vbl = 30, .vso = 5, .vspw = 20, |
| .phsync = '+', .pvsync = '+' }, |
| [EDID_MODE_1920x1080_60Hz] = { |
| .name = "1920x1080@60Hz", .pixel_clock = 148500, .refresh = 60, |
| .ha = 1920, .hbl = 280, .hso = 88, .hspw = 44, |
| .va = 1080, .vbl = 45, .vso = 4, .vspw = 5, |
| .phsync = '+', .pvsync = '+' }, |
| }; |
| |
| int set_display_mode(struct edid *edid, enum edid_modes mode) |
| { |
| if (mode == EDID_MODE_AUTO) |
| return 0; |
| |
| if (edid->mode_is_supported[mode]) { |
| printk(BIOS_DEBUG, "Forcing mode %s\n", known_modes[mode].name); |
| edid->mode = known_modes[mode]; |
| return 0; |
| } |
| |
| printk(BIOS_ERR, "Requested display mode not supported.\n"); |
| return -1; |
| } |
| |
| /* |
| * Given a raw edid block, decode it into a form |
| * that other parts of coreboot can use -- mainly |
| * graphics bringup functions. The raw block is |
| * required to be 128 bytes long, per the standard, |
| * but we have no way of checking this minimum length. |
| * We accept what we are given. |
| */ |
| int decode_edid(unsigned char *edid, int size, struct edid *out) |
| { |
| int analog, i, j; |
| struct edid_context c = { |
| .has_valid_cvt = 1, |
| .has_valid_dummy_block = 1, |
| .has_valid_descriptor_ordering = 1, |
| .has_valid_detailed_blocks = 1, |
| .has_valid_descriptor_pad = 1, |
| .has_valid_range_descriptor = 1, |
| .has_valid_max_dotclock = 1, |
| .has_valid_string_termination = 1, |
| .conformant = EDID_CONFORMANT, |
| }; |
| |
| if (!edid) { |
| printk(BIOS_ERR, "No EDID found\n"); |
| return EDID_ABSENT; |
| } |
| |
| dump_breakdown(edid); |
| |
| if (memcmp(edid, "\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00", 8)) { |
| printk(BIOS_ERR, "No header found\n"); |
| return EDID_ABSENT; |
| } |
| |
| memset(out, 0, sizeof(*out)); |
| |
| if (manufacturer_name(edid + 0x08, out->manufacturer_name)) |
| c.manufacturer_name_well_formed = 1; |
| |
| extra_info.model = (unsigned short)(edid[0x0A] + (edid[0x0B] << 8)); |
| extra_info.serial = (unsigned int)(edid[0x0C] + (edid[0x0D] << 8) |
| + (edid[0x0E] << 16) + (edid[0x0F] << 24)); |
| |
| printk(BIOS_SPEW, "Manufacturer: %s Model %x Serial Number %u\n", |
| out->manufacturer_name, |
| (unsigned short)(edid[0x0A] + (edid[0x0B] << 8)), |
| (unsigned int)(edid[0x0C] + (edid[0x0D] << 8) |
| + (edid[0x0E] << 16) + (edid[0x0F] << 24))); |
| /* XXX need manufacturer ID table */ |
| |
| if (edid[0x10] < 55 || edid[0x10] == 0xff) { |
| c.has_valid_week = 1; |
| if (edid[0x11] > 0x0f) { |
| if (edid[0x10] == 0xff) { |
| c.has_valid_year = 1; |
| printk(BIOS_SPEW, |
| "Made week %hhd of model year %hhd\n", |
| edid[0x10], edid[0x11]); |
| extra_info.week = edid[0x10]; |
| extra_info.year = edid[0x11]; |
| } else { |
| /* we know it's at least 2013, when this code |
| * was written |
| */ |
| if (edid[0x11] + 90 <= 2013) { |
| c.has_valid_year = 1; |
| printk(BIOS_SPEW, |
| "Made week %hhd of %d\n", |
| edid[0x10], edid[0x11] + 1990); |
| extra_info.week = edid[0x10]; |
| extra_info.year = edid[0x11] + 1990; |
| } |
| } |
| } |
| } |
| |
| printk(BIOS_SPEW, "EDID version: %hhd.%hhd\n", edid[0x12], edid[0x13]); |
| extra_info.version[0] = edid[0x12]; |
| extra_info.version[1] = edid[0x13]; |
| |
| if (edid[0x12] == 1) { |
| if (edid[0x13] > 4) { |
| printk(BIOS_SPEW, |
| "Claims > 1.4, assuming 1.4 conformance\n"); |
| edid[0x13] = 4; |
| } |
| switch (edid[0x13]) { |
| case 4: |
| c.claims_one_point_four = 1; |
| /* fall through */ |
| case 3: |
| c.claims_one_point_three = 1; |
| /* fall through */ |
| case 2: |
| c.claims_one_point_two = 1; |
| /* fall through */ |
| default: |
| c.claims_one_point_oh = 1; |
| } |
| } |
| |
| /* display section */ |
| if (edid[0x14] & 0x80) { |
| int conformance_mask; |
| analog = 0; |
| printk(BIOS_SPEW, "Digital display\n"); |
| if (c.claims_one_point_four) { |
| conformance_mask = 0; |
| if ((edid[0x14] & 0x70) == 0x00) |
| printk(BIOS_SPEW, "Color depth is undefined\n"); |
| else if ((edid[0x14] & 0x70) == 0x70) |
| c.nonconformant_digital_display = 1; |
| else |
| printk(BIOS_SPEW, |
| "%d bits per primary color channel\n", |
| ((edid[0x14] & 0x70) >> 3) + 4); |
| out->panel_bits_per_color = ((edid[0x14] & 0x70) >> 3) |
| + 4; |
| out->panel_bits_per_pixel = 3*out->panel_bits_per_color; |
| |
| switch (edid[0x14] & 0x0f) { |
| case 0x00: |
| printk(BIOS_SPEW, |
| "Digital interface is not defined\n"); |
| break; |
| case 0x01: |
| printk(BIOS_SPEW, "DVI interface\n"); |
| break; |
| case 0x02: |
| printk(BIOS_SPEW, "HDMI-a interface\n"); |
| break; |
| case 0x03: |
| printk(BIOS_SPEW, "HDMI-b interface\n"); |
| break; |
| case 0x04: |
| printk(BIOS_SPEW, "MDDI interface\n"); |
| break; |
| case 0x05: |
| printk(BIOS_SPEW, "DisplayPort interface\n"); |
| break; |
| default: |
| c.nonconformant_digital_display = 1; |
| break; |
| } |
| extra_info.type = edid[0x14] & 0x0f; |
| } else if (c.claims_one_point_two) { |
| conformance_mask = 0x7E; |
| if (edid[0x14] & 0x01) |
| printk(BIOS_SPEW, "DFP 1.x compatible TMDS\n"); |
| } else |
| conformance_mask = 0x7F; |
| |
| if (!c.nonconformant_digital_display) |
| c.nonconformant_digital_display = edid[0x14] |
| & conformance_mask; |
| extra_info.nonconformant = c.nonconformant_digital_display; |
| } else { |
| analog = 1; |
| int voltage = (edid[0x14] & 0x60) >> 5; |
| int sync = (edid[0x14] & 0x0F); |
| extra_info.voltage = voltage; |
| extra_info.sync = sync; |
| |
| printk(BIOS_SPEW, "Analog display, Input voltage level: %s V\n", |
| voltage == 3 ? "0.7/0.7" : |
| voltage == 2 ? "1.0/0.4" : |
| voltage == 1 ? "0.714/0.286" : |
| "0.7/0.3"); |
| |
| if (c.claims_one_point_four) { |
| if (edid[0x14] & 0x10) |
| printk(BIOS_SPEW, |
| "Blank-to-black setup/pedestal\n"); |
| else |
| printk(BIOS_SPEW, |
| "Blank level equals black level\n"); |
| } else if (edid[0x14] & 0x10) { |
| /* |
| * XXX this is just the X text. 1.3 says "if set, |
| * display expects a blank-to-black setup or pedestal |
| * per appropriate Signal Level Standard". Whatever |
| * _that_ means. |
| */ |
| printk(BIOS_SPEW, "Configurable signal levels\n"); |
| } |
| |
| printk(BIOS_SPEW, "Sync: %s%s%s%s\n", |
| sync & 0x08 ? "Separate " : "", |
| sync & 0x04 ? "Composite " : "", |
| sync & 0x02 ? "SyncOnGreen " : "", |
| sync & 0x01 ? "Serration " : ""); |
| } |
| |
| |
| if (edid[0x15] && edid[0x16]) { |
| printk(BIOS_SPEW, "Maximum image size: %d cm x %d cm\n", |
| edid[0x15], edid[0x16]); |
| } else if (c.claims_one_point_four && (edid[0x15] || edid[0x16])) { |
| if (edid[0x15]) { /* edid[0x15] != 0 && edid[0x16] == 0 */ |
| unsigned int ratio = 100000/(edid[0x15] + 99); |
| printk(BIOS_SPEW, |
| "Aspect ratio is %u.%03u (landscape)\n", |
| ratio / 1000, ratio % 1000); |
| } else { /* edid[0x15] == 0 && edid[0x16] != 0 */ |
| unsigned int ratio = 100000/(edid[0x16] + 99); |
| printk(BIOS_SPEW, |
| "Aspect ratio is %u.%03u (portrait)\n", |
| ratio / 1000, ratio % 1000); |
| } |
| } else { |
| /* Either or both can be zero for 1.3 and before */ |
| printk(BIOS_SPEW, "Image size is variable\n"); |
| } |
| |
| if (edid[0x17] == 0xff) { |
| if (c.claims_one_point_four) |
| printk(BIOS_SPEW, |
| "Gamma is defined in an extension block\n"); |
| else |
| /* XXX Technically 1.3 doesn't say this... */ |
| printk(BIOS_SPEW, "Gamma: 1.0\n"); |
| } else |
| printk(BIOS_SPEW, "Gamma: %d%%\n", ((edid[0x17] + 100))); |
| printk(BIOS_SPEW, "Check DPMS levels\n"); |
| if (edid[0x18] & 0xE0) { |
| printk(BIOS_SPEW, "DPMS levels:"); |
| if (edid[0x18] & 0x80) |
| printk(BIOS_SPEW, " Standby"); |
| if (edid[0x18] & 0x40) |
| printk(BIOS_SPEW, " Suspend"); |
| if (edid[0x18] & 0x20) |
| printk(BIOS_SPEW, " Off"); |
| printk(BIOS_SPEW, "\n"); |
| } |
| |
| /* FIXME: this is from 1.4 spec, check earlier */ |
| if (analog) { |
| switch (edid[0x18] & 0x18) { |
| case 0x00: |
| printk(BIOS_SPEW, "Monochrome or grayscale display\n"); |
| break; |
| case 0x08: |
| printk(BIOS_SPEW, "RGB color display\n"); |
| break; |
| case 0x10: |
| printk(BIOS_SPEW, "Non-RGB color display\n"); |
| break; |
| case 0x18: |
| printk(BIOS_SPEW, "Undefined display color type\n"); |
| break; |
| } |
| } else { |
| printk(BIOS_SPEW, "Supported color formats: RGB 4:4:4"); |
| if (edid[0x18] & 0x10) |
| printk(BIOS_SPEW, ", YCrCb 4:4:4"); |
| if (edid[0x18] & 0x08) |
| printk(BIOS_SPEW, ", YCrCb 4:2:2"); |
| printk(BIOS_SPEW, "\n"); |
| } |
| |
| if (edid[0x18] & 0x04) |
| printk(BIOS_SPEW, |
| "Default (sRGB) color space is primary color space\n"); |
| if (edid[0x18] & 0x02) { |
| printk(BIOS_SPEW, |
| "First detailed timing is preferred timing\n"); |
| c.has_preferred_timing = 1; |
| } |
| if (edid[0x18] & 0x01) |
| printk(BIOS_SPEW, |
| "Supports GTF timings within operating range\n"); |
| |
| /* XXX color section */ |
| |
| printk(BIOS_SPEW, "Established timings supported:\n"); |
| /* it's not yet clear we want all this stuff in the edid struct. |
| * Let's wait. |
| */ |
| for (i = 0; i < 17; i++) { |
| if (edid[0x23 + i / 8] & (1 << (7 - i % 8))) { |
| printk(BIOS_SPEW, " %dx%d@%dHz\n", |
| established_timings[i].x, |
| established_timings[i].y, |
| established_timings[i].refresh); |
| |
| for (j = 0; j < NUM_KNOWN_MODES; j++) { |
| if (known_modes[j].ha == |
| established_timings[i].x |
| && known_modes[j].va == |
| established_timings[i].y |
| && known_modes[j].refresh == |
| established_timings[i].refresh) |
| out->mode_is_supported[j] = 1; |
| } |
| } |
| |
| } |
| |
| printk(BIOS_SPEW, "Standard timings supported:\n"); |
| for (i = 0; i < 8; i++) { |
| uint8_t b1 = edid[0x26 + i * 2], b2 = edid[0x26 + i * 2 + 1]; |
| unsigned int x, y = 0, refresh; |
| |
| if (b1 == 0x01 && b2 == 0x01) |
| continue; |
| |
| if (b1 == 0) { |
| printk(BIOS_SPEW, |
| "non-conformant standard timing (0 horiz)\n"); |
| continue; |
| } |
| x = (b1 + 31) * 8; |
| switch ((b2 >> 6) & 0x3) { |
| case 0x00: |
| if (c.claims_one_point_three) |
| y = x * 10 / 16; |
| else |
| y = x; |
| break; |
| case 0x01: |
| y = x * 3 / 4; |
| break; |
| case 0x02: |
| y = x * 4 / 5; |
| break; |
| case 0x03: |
| y = x * 9 / 16; |
| break; |
| } |
| refresh = 60 + (b2 & 0x3f); |
| |
| printk(BIOS_SPEW, " %dx%d@%dHz\n", x, y, refresh); |
| for (j = 0; j < NUM_KNOWN_MODES; j++) { |
| if (known_modes[j].ha == x && known_modes[j].va == y && |
| known_modes[j].refresh == refresh) |
| out->mode_is_supported[j] = 1; |
| } |
| } |
| |
| /* detailed timings */ |
| printk(BIOS_SPEW, "Detailed timings\n"); |
| for (i = 0; i < 4; i++) { |
| c.has_valid_detailed_blocks &= detailed_block( |
| out, edid + 0x36 + i * 18, 0, &c); |
| if (i == 0 && c.has_preferred_timing |
| && !c.did_detailed_timing) { |
| /* not really accurate... */ |
| c.has_preferred_timing = 0; |
| } |
| } |
| |
| /* check this, 1.4 verification guide says otherwise */ |
| if (edid[0x7e]) { |
| printk(BIOS_SPEW, "Has %d extension blocks\n", edid[0x7e]); |
| /* 2 is impossible because of the block map */ |
| if (edid[0x7e] != 2) |
| c.has_valid_extension_count = 1; |
| } else { |
| c.has_valid_extension_count = 1; |
| } |
| |
| printk(BIOS_SPEW, "Checksum\n"); |
| c.has_valid_checksum = do_checksum(edid); |
| |
| /* EDID v2.0 has a larger blob (256 bytes) and may have some problem in |
| * the extension parsing loop below. Since v2.0 was quickly deprecated |
| * by v1.3 and we are unlikely to use any EDID 2.0 panels, we ignore |
| * that case now and can fix it when we need to use a real 2.0 panel. |
| */ |
| for (i = 128; i < size; i += 128) |
| c.nonconformant_extension += |
| parse_extension(out, &edid[i], &c); |
| |
| if (c.claims_one_point_four) { |
| if (c.nonconformant_digital_display || |
| !c.has_valid_string_termination || |
| !c.has_valid_descriptor_pad || |
| !c.has_preferred_timing) { |
| c.conformant = EDID_NOT_CONFORMANT; |
| printk(BIOS_ERR, |
| "EDID block does NOT conform to EDID 1.4!\n"); |
| } |
| |
| if (c.nonconformant_digital_display) |
| printk(BIOS_ERR, |
| "\tDigital display field contains garbage: %x\n", |
| c.nonconformant_digital_display); |
| if (!c.has_valid_string_termination) |
| printk(BIOS_ERR, |
| "\tDetailed block string not properly terminated\n"); |
| if (!c.has_valid_descriptor_pad) |
| printk(BIOS_ERR, |
| "\tInvalid descriptor block padding\n"); |
| if (!c.has_preferred_timing) |
| printk(BIOS_ERR, "\tMissing preferred timing\n"); |
| } else if (c.claims_one_point_three) { |
| if (c.nonconformant_digital_display || |
| !c.has_valid_string_termination || |
| !c.has_valid_descriptor_pad || |
| !c.has_preferred_timing) { |
| c.conformant = EDID_NOT_CONFORMANT; |
| } |
| /** |
| * According to E-EDID (EDIDv1.3), has_name_descriptor and |
| * has_range_descriptor are both required. These fields are |
| * optional in v1.4. However some v1.3 panels (Ex, B133XTN01.3) |
| * don't have them. As a workaround, we only print warning |
| * messages. |
| */ |
| if (c.conformant == EDID_NOT_CONFORMANT) |
| printk(BIOS_ERR, |
| "EDID block does NOT conform to EDID 1.3!\n"); |
| else if (!c.has_name_descriptor || !c.has_range_descriptor) |
| printk(BIOS_WARNING, "WARNING: EDID block does NOT " |
| "fully conform to EDID 1.3.\n"); |
| |
| if (c.nonconformant_digital_display) |
| printk(BIOS_ERR, |
| "\tDigital display field contains garbage: %x\n", |
| c.nonconformant_digital_display); |
| if (!c.has_name_descriptor) |
| printk(BIOS_ERR, "\tMissing name descriptor\n"); |
| if (!c.has_preferred_timing) |
| printk(BIOS_ERR, "\tMissing preferred timing\n"); |
| if (!c.has_range_descriptor) |
| printk(BIOS_ERR, "\tMissing monitor ranges\n"); |
| /* Might be more than just 1.3 */ |
| if (!c.has_valid_descriptor_pad) |
| printk(BIOS_ERR, |
| "\tInvalid descriptor block padding\n"); |
| if (!c.has_valid_string_termination) /* Likewise */ |
| printk(BIOS_ERR, |
| "\tDetailed block string not properly terminated\n"); |
| } else if (c.claims_one_point_two) { |
| if (c.nonconformant_digital_display || |
| !c.has_valid_string_termination) { |
| c.conformant = EDID_NOT_CONFORMANT; |
| printk(BIOS_ERR, |
| "EDID block does NOT conform to EDID 1.2!\n"); |
| } |
| if (c.nonconformant_digital_display) |
| printk(BIOS_ERR, |
| "\tDigital display field contains garbage: %x\n", |
| c.nonconformant_digital_display); |
| if (!c.has_valid_string_termination) |
| printk(BIOS_ERR, |
| "\tDetailed block string not properly terminated\n"); |
| } else if (c.claims_one_point_oh) { |
| if (c.seen_non_detailed_descriptor) { |
| c.conformant = EDID_NOT_CONFORMANT; |
| printk(BIOS_ERR, |
| "EDID block does NOT conform to EDID 1.0!\n"); |
| } |
| if (c.seen_non_detailed_descriptor) |
| printk(BIOS_ERR, |
| "\tHas descriptor blocks other than detailed timings\n"); |
| } |
| |
| if (c.nonconformant_extension || |
| !c.has_valid_checksum || |
| !c.has_valid_cvt || |
| !c.has_valid_year || |
| !c.has_valid_week || |
| !c.has_valid_detailed_blocks || |
| !c.has_valid_dummy_block || |
| !c.has_valid_extension_count || |
| !c.has_valid_descriptor_ordering || |
| !c.has_valid_range_descriptor || |
| !c.manufacturer_name_well_formed) { |
| c.conformant = EDID_NOT_CONFORMANT; |
| printk(BIOS_ERR, "EDID block does not conform at all!\n"); |
| if (c.nonconformant_extension) |
| printk(BIOS_ERR, |
| "\tHas %d nonconformant extension block(s)\n", |
| c.nonconformant_extension); |
| if (!c.has_valid_checksum) |
| printk(BIOS_ERR, "\tBlock has broken checksum\n"); |
| if (!c.has_valid_cvt) |
| printk(BIOS_ERR, "\tBroken 3-byte CVT blocks\n"); |
| if (!c.has_valid_year) |
| printk(BIOS_ERR, "\tBad year of manufacture\n"); |
| if (!c.has_valid_week) |
| printk(BIOS_ERR, "\tBad week of manufacture\n"); |
| if (!c.has_valid_detailed_blocks) |
| printk(BIOS_ERR, |
| "\tDetailed blocks filled with garbage\n"); |
| if (!c.has_valid_dummy_block) |
| printk(BIOS_ERR, "\tDummy block filled with garbage\n"); |
| if (!c.has_valid_extension_count) |
| printk(BIOS_ERR, |
| "\tImpossible extension block count\n"); |
| if (!c.manufacturer_name_well_formed) |
| printk(BIOS_ERR, |
| "\tManufacturer name field contains garbage\n"); |
| if (!c.has_valid_descriptor_ordering) |
| printk(BIOS_ERR, |
| "\tInvalid detailed timing descriptor ordering\n"); |
| if (!c.has_valid_range_descriptor) |
| printk(BIOS_ERR, |
| "\tRange descriptor contains garbage\n"); |
| if (!c.has_valid_max_dotclock) |
| printk(BIOS_ERR, |
| "\tEDID 1.4 block does not set max dotclock\n"); |
| } |
| |
| if (c.warning_excessive_dotclock_correction) |
| printk(BIOS_ERR, |
| "Warning: CVT block corrects dotclock by more than 9.75MHz\n"); |
| if (c.warning_zero_preferred_refresh) |
| printk(BIOS_ERR, |
| "Warning: CVT block does not set preferred refresh rate\n"); |
| return c.conformant; |
| } |
| |
| /* |
| * Notes on panel extensions: (TODO, implement me in the code) |
| * |
| * EPI: http://www.epi-standard.org/fileadmin/spec/EPI_Specification1.0.pdf |
| * at offset 0x6c (fourth detailed block): (all other bits reserved) |
| * 0x6c: 00 00 00 0e 00 |
| * 0x71: bit 6-5: data color mapping (00 conventional/fpdi/vesa, 01 openldi) |
| * bit 4-3: pixels per clock (00 1, 01 2, 10 4, 11 reserved) |
| * bit 2-0: bits per pixel (000 18, 001 24, 010 30, else reserved) |
| * 0x72: bit 5: FPSCLK polarity (0 normal 1 inverted) |
| * bit 4: DE polarity (0 high active 1 low active) |
| * bit 3-0: interface (0000 LVDS TFT |
| * 0001 mono STN 4/8bit |
| * 0010 color STN 8/16 bit |
| * 0011 18 bit tft |
| * 0100 24 bit tft |
| * 0101 tmds |
| * else reserved) |
| * 0x73: bit 1: horizontal display mode (0 normal 1 right/left reverse) |
| * bit 0: vertical display mode (0 normal 1 up/down reverse) |
| * 0x74: bit 7-4: total poweroff seq delay (0000 vga controller default |
| * else time in 10ms (10ms to 150ms)) |
| * bit 3-0: total poweron seq delay (as above) |
| * 0x75: contrast power on/off seq delay, same as 0x74 |
| * 0x76: bit 7: backlight control enable (1 means this field is valid) |
| * bit 6: backlight enabled at boot (0 on 1 off) |
| * bit 5-0: backlight brightness control steps (0..63) |
| * 0x77: bit 7: contrast control, same bit pattern as 0x76 except bit 6 resvd |
| * 0x78 - 0x7c: reserved |
| * 0x7d: bit 7-4: EPI descriptor major version (1) |
| * bit 3-0: EPI descriptor minor version (0) |
| * |
| * ---- |
| * |
| * SPWG: http://www.spwg.org/spwg_spec_version3.8_3-14-2007.pdf |
| * |
| * Since these are "dummy" blocks, terminate with 0a 20 20 20 ... as usual |
| * |
| * detailed descriptor 3: |
| * 0x5a - 0x5e: 00 00 00 fe 00 |
| * 0x5f - 0x63: PC maker part number |
| * 0x64: LCD supplier revision # |
| * 0x65 - 0x6b: manufacturer part number |
| * |
| * detailed descriptor 4: |
| * 0x6c - 0x70: 00 00 00 fe 00 |
| * 0x71 - 0x78: smbus nits values (whut) |
| * 0x79: number of lvds channels (1 or 2) |
| * 0x7A: panel self test (1 if present) |
| * and then dummy terminator |
| * |
| * SPWG also says something strange about the LSB of detailed descriptor 1: |
| * "LSB is set to "1" if panel is DE-timing only. H/V can be ignored." |
| */ |
| |
| /* Set the framebuffer bits-per-pixel, recalculating all dependent values. */ |
| void edid_set_framebuffer_bits_per_pixel(struct edid *edid, int fb_bpp, |
| int row_byte_alignment) |
| { |
| /* Caller should pass a supported value, everything else is BUG(). */ |
| assert(fb_bpp == 32 || fb_bpp == 24 || fb_bpp == 16); |
| row_byte_alignment = MAX(row_byte_alignment, 1); |
| |
| edid->framebuffer_bits_per_pixel = fb_bpp; |
| edid->bytes_per_line = ALIGN_UP(edid->mode.ha * |
| DIV_ROUND_UP(fb_bpp, 8), row_byte_alignment); |
| edid->x_resolution = edid->bytes_per_line / (fb_bpp / 8); |
| edid->y_resolution = edid->mode.va; |
| } |